+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   4716 Urey (1989 UL5) Classification: Main-belt Asteroid          SPK-ID: 2004716 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1337741771790939 3.2069e-08   a 3.181256839952718 1.6775e-08 au q 2.755686823792679 9.7735e-08 au i 10.13672937426205 5.0039e-06 deg node 20.13794457168703 1.8797e-05 deg peri 100.9260083471052 2.691e-05 deg M 65.44001659553511 1.8454e-05 deg tp 2458623.763735649897 (2019-May-20.26373565) 0.0001058 TDB period 2072.509486119089 5.67 1.6393e-05 4.488e-08 d yr n .1737024618758796 1.3739e-09 deg/d Q 3.606826856112757 1.9019e-08 au   Orbit Determination Parameters    # obs. used (total)      2301      data-arc span      24127 days (66.06 yr)      first obs. used      1954-07-29      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42919      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:49:17   Additional Information  Earth MOID = 1.79412 au   Jupiter MOID = 1.55203 au   T_jup = 3.161  [ hide covariance matrix ] Orbital Elements at Epoch 2456935.5 (2014-Oct-05.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1353555260602471 3.2059e-08   q 2.749790504469031 9.7848e-08 au tp 2456550.740461602619 (2013-Sep-15.24046160) 0.00010348 TDB node 20.16741996249281 1.8798e-05 deg peri 100.9437194558367 2.6744e-05 deg i 10.13881132676719 5.0046e-06 deg   Orbit Determination Parameters    # obs. used (total)      2301      data-arc span      24127 days (66.06 yr)      first obs. used      1954-07-29      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42919      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:49:17   Additional Information  Jupiter MOID = 1.55203 au   T_jup = 3.161  Orbit Covariance (6×6)   e q tp node peri i e 1.02778939273498E-15 -3.107090894550992E-15 6.941405530831729E-13 4.140509430998363E-16 1.274868232060956E-13 -8.052964306763182E-17 q -3.107090894550992E-15 9.57418156840904E-15 -2.243441619994176E-12 -6.001774653861166E-16 -4.058085978571762E-13 6.915724709300753E-16 tp 6.941405530831729E-13 -2.243441619994176E-12 1.07088039372246E-8 -6.115926227328079E-12 1.978341007648104E-9 1.003230177799483E-12 node 4.140509430998363E-16 -6.001774653861166E-16 -6.115926227328079E-12 3.533517929289034E-10 -3.484711367046023E-10 -8.449059781225122E-12 peri 1.274868232060956E-13 -4.058085978571762E-13 1.978341007648104E-9 -3.484711367046023E-10 7.152188234612938E-10 8.54717523324858E-12 i -8.052964306763182E-17 6.915724709300753E-16 1.003230177799483E-12 -8.449059781225122E-12 8.54717523324858E-12 2.504622695392445E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.6   n/a MPO279564   diameter diameter 15.409 km 0.328 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   rotation period rot_per 5.9260 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bull. 41, 195-198.] [Clark, M. (2015) Minor Planet Bull. 42, 15-20.] geometric albedo albedo 0.155   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   4716 Urey           Discovered 1989 Oct. 30 by S. J. Bus at Cerro Tololo. Winner of the 1934 Nobel Prize in chemistry for his discovery of deuterium, Harold Urey (1893-1981) was also one of the founders of planetary science as we know it today. His classic book The Planets (1952) discussed planetary objects and meteorites in the context of chemical and physical relationships. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001013/MPCPages.arc Last Updated: 2013-03-29 [ show close-approach data ] Alternate Designations  1989 UL5 = 1969 EA1 = 1978 RN16  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-25 22:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin